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Posted on Mar 08, 2017

T2642 eMachine - does not turn on

Hello oldnovii !
I have a T2642 eMachine that will not power up. It makes no sounds and the monitor does not lightup (but the monitor on/off switch glows green). The fan on the power supply runs ok but the fan on the motherboard does not(fan on mb makes 3 rotations when power cord is initially plugged in, then stops turning). The yellow LED, below the on/off switch, flashes at high rate of speed. A few months back I purchased a new power supply... an "ATX 12V Pentium 4" made by REXUS, as I had heard that power supplies are notorius for causing problems like the one I have. But after replacing the original ps with the new one... no difference - same problem.
There are six wires leading out of the area where the on/off switch is located but I'm not sure which two wires actually connect the switch to the mb? If I knew which ones they are, I could short them together to determine if the switch itself is malfunctioning. At any rate, what do you recommend I do next?

  • 8 more comments 
  • 211Mike Apr 12, 2008

    oldnovii... all the wires are hooked up! When I push the power button, nothing happens (when I push and hold the power for 5 to 10 secs, nothing happens). If I press any key on the keyboard, nothing happens. I don't remember if the light on the monitor changes color or not, but it is currently lit green. It's hard to say if the pc is hibernating, however I suspect something is preventing power to the mb... because the fan on the mb does not run.

    It's interesting, because the new ps does not change a thing verses the old ps. Does this mean the old ps is still good? I have not checked the voltages coming off the old ps... but I'm not sure it would tell me anything anyway if the load is not working? Is there a guide that tells me which connector / wire colors carry specific voltages? Do the connectors have to be plugged into their respective sockets to make the ps function? These are things I'm not sure about, but I can get a volt/ohm meter. Sorry about all the questions as they pop-up in my mind.

    Is there anything else I provide to you about this problematic pc?

  • 211Mike Apr 13, 2008

    Wel-l-l-l-l oldnovii... it sounds like a great learning experience! Let's break her down. Will I need any special tools, besides a very large sludge hammer? ;-)

    I'll be out of town tomorrow and Monday... visiting my father, then my granddaughter. However, I may have a couple of hours each morning... but I'm not in any rush. So whenever you want to get started simply send me the steps you want me to follow. Oh!, since tomorrow is Sunday, I'll say an extra pray... that the old girl will cooperate!

    If I haven't said so, thanks for your help!

  • 211Mike Apr 13, 2008

    Never been to "the windy city" oldnovii, other than passing through via airport. I have a good friend who used to live there for many years, as he's retired now from lucent technologies (actually I think lucent is retiring too!). How's the fishing in your area of the Great Lakes region? At any rate, the new ps's rated power output max is 400W, as the old one is 300W. I look forward to the "bit of wisdom" you are about to sprinkle upon me!

  • 211Mike Apr 20, 2008

    oldnovii... when I didn't hear from you for a while, I figured you got tied up with something else. At any rate, I haven't check my email in a couple of days. I'm going to tear down the pc this evening per your instructions, as it doesn't sound to tough. I'll let you know how it goes.



    PS - yes, I am a BROWNS fan... how in the world did you become a steelers fan????

  • 211Mike Apr 20, 2008

    oldnovii,

    I did as you instructed. The mb is now removed. The ps is still in the cabinet. (FYI - the cabinet only has one side that is removeable, as the other side is riveted to the cabinet)



    PS - going fishing for walleye tomorrow... hope to have a fishin story to tell.

  • Anonymous May 11, 2010

    Haven't heard from you in a while. Just wanted to make sure you was ok dude. Send me email at [email protected]



    Jeff

  • Anonymous May 11, 2010

    Sorry - alot things goin' on over here. We'll have to keep in touch after all is said and done. Even though you're probably a Browns fan. S-T-E-E-L-E-R-S! Anyway - got that thing apart yet? Your a guy, should just figured it out. Looks intimidating doesn't it? After ya done a few it's nothing.

    1) Unplug power cable from wall - then pc.

    1a)Remove everything else plugged into back.

    (Keybd, mouse,monitor,etc.)

    2)Ground yourself by touching frame of pc.

    3)Remove thumb screws from one back side.

    4)Slide off side cover

    5)Repeat steps 3 & 4 for other side.

    6)Disconnect all power cables from drives, fans, etc,

    If you need to take notes on where your cables go, do it.

    Not the power cables unless you have a lighted cabinet

    and they have to be in a particular order but I don't think

    (wannab)eMachines does that.

    7)Remove the drive cables.

    8)Remove the drive cage.

    9)If the cd/dvd drive is blocking the mb, remove that.

    10)Remove any boards from the mb. (NIC card, video card, etc.)

    11) Next, don't get ahead, remove the cables leading from the front panel to the mb. You might want to have good lighting or have a flashlight just so you can see where they're hooked

    up to on the mb. The mb should be marked and so should the

    cable. Look before you pull them off. Look at the mb where

    they're connected. There should be about 5 or 6. Stuff like HDD, power, speaker, etc. Might want to twist tie them when you're done to keep them out of the way.

    12) At this point, you got an empty cabinet with a ps and a mb.

    Now, you can probably get the mb out with ps still in. There

    will be anywhere from...oh..4 to 8 screws holding it in. Probably phillips head..Lay the cabinet down on a towel or something,

    ( I don't like to even scratch my work bench) , so the mb won't fall. Start removing screws. I leave the inside ones for last if there are any. There are probably little round or 6-sided (6 or 5 I don't know) metal things that the screws are screwed into. These are standoffs. There It's ok if these come unscrewed just remember where everything is and goes. These are so the mb won't ground it self against the other side or parts of the cabinet. Once you unscrew the last screw the mb will be lose. That's why we have it laying down. Now ,grab a hold of it and lift the cabinet, and you'll see on the side that's the back of the mb, round things that have to come through holes to get the mb out. It may be just attached by the screws. Either way, if you match up the holes and gently pull, the mb should come right out. You might have to lean it on an angle to get around the ps.

    When you get this far, let me know how sucky my instructions were and tell that you got this far. Talk to you soon.

    Good luck Mr. Phelps.

  • Anonymous May 11, 2010

    Sounds like a plan. You could just bring that one and any others you have to Chicago and we'll fix 'em all. You beat me to the line about the slrdge hammer! You'll just need the usual suspects - phillips, flathead, needle nose, good eyes, etc. I'll get a schematic of your case just in case... Boy, one little question and look what I'm in to... I kid...little bit. I'll send you some things to do. Oh, btw, what's the wattage on your ps?

  • Anonymous May 11, 2010

    Do you want to do what I'd do? It sounds like it could be the mb but there are things I would do just to be sure. If you want to do them let me know. It would include such things as removing the mb. Sounds worse than it is, really quite easy for someone like you. It basically excludes everything except your motherboard and power supply. Just about anything can can cause a power drain and these steps would eliminate them one at a time. So do you wan't to break her down or do you want to try and troubleshoot with it all together? Your call - I'll do whatever you want.

  • Anonymous May 11, 2010

    Boy.. you bring good stuff, gotta start my business back up. Anyway, eMachines are junk. When the power supplies go out on those things alot of times they take the mbs with them. So, let's see what we have. New power supply seems to be running ok. The yellow flashing light is your hard drive activity light. All the wires hooked up? What happens if you try the power button? Does the light on the monitor normally change from red to green once it gets a video signal? ( pc is on and not hibernating, power save mode, etc)

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5 Related Answers

Anonymous

  • 3587 Answers
  • Posted on Feb 15, 2008

SOURCE: pover up trouble

sounds like something is drawing down on your 12 volt supply drives or on board regulators. Try it without the drives connectged, and see if you can get the system to boot up(you'll just get a notice that your drives are unavailable, but you'll already know that, right?

got backup for your Dell?

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Anonymous

  • 141 Answers
  • Posted on Jul 05, 2008

SOURCE: Emachine flashing yellow lights, fans power up when P8 is unplugged

Did some research and found this site which will tell you which pins to test. It is possible also that its not powerful enough for the devices you have. I would try again only giving power to the motherboard pins, of coarse and the hard drive. If works then plug one device at a time.
Good luck

http://articles.techrepublic.com.com/5100-10878_11-1046822.html

Anonymous

  • 55 Answers
  • Posted on Nov 25, 2008

SOURCE: wont power up

Try replacing the memory.

Jason

  • 42 Answers
  • Posted on Jan 15, 2009

SOURCE: 2 ATX POWER SUPPLY PLUGS

Some motherboard/cpu setups require an additional 4-pin connector for additional power on the motherboard. The motherboard will require either a 20-pin or a 24-pin power connector (main power), and might need the additional 4 pin as well. If the motherboard will accept the additional 4-pin, then connect it!

Anonymous

  • 6 Answers
  • Posted on Jan 27, 2009

SOURCE: emachines W2888 not turning on

Easy fix! Sounds like you bought a bad Power supply. Purchase an identical p.supply and it will run like a car!

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